Pelant, Jan - Costantini, C. - Fedeli, A.
Bases, .pi.-bases and quasi-developments.
Topology Proceedings. Roč. 19, - (1994), s. 1-7. ISSN 0146-4124
Grant CEP: GA AV ČR IAA119401; GA ČR GA201/94/0069
http://hdl.handle.net/11104/0071233